EVB-L
AN9252-DIG-IO EtherC
A
T
® DIG I/O User’s Guide
DS500023
32A-page 2
6
Prelimina
ry
2014 Microchip T
echnolo
gy Inc.
FIGURE B-1:
EVB-LAN9252-DIG-IO SCHEMATIC POWER SUPPLY & RESET
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
Reset Generator
POWER SUPPLY
(Rb)
(Ra)
OKR-T/3-W12-C
3 V REGULATOR, 3A
( 3V3 fixed when Rb=470E)
"3
V
3
P
res
ent"
Note:
1.POR -> Reset to ASIC & SOC (Default)
2.RESET O/P from ASIC -> Reset to EX-PHY (PORT2) & SOC :Only Ethercat sku
3.RESET from SOC (GPIO/RST-O/P) -> Reset to ASIC
4.RESET from Push Botton -> Reset to ASIC & SOC
"Reset"
RESET Options
5V_SW
EN12_1
VOUT_3V3
5V_EXT
3V3
3V3
5V
3V3
3V3
3V3
3V3
RST#
Size:
Part Number:
Rev
Date:
Sheet
of
Chennai
India
Project
Name:
Page:
Name:
Board
LAN9252-DIG-IO-EVB
B
B
3
9
Tuesday, October 21, 2014
LAN9252-DIG-IO-EVB
Power Supply & RST
EVB3-9252-DIG-I/O-RevB
Size:
Part Number:
Rev
Date:
Sheet
of
Chennai
India
Project
Name:
Page:
Name:
Board
LAN9252-DIG-IO-EVB
B
B
3
9
Tuesday, October 21, 2014
LAN9252-DIG-IO-EVB
Power Supply & RST
EVB3-9252-DIG-I/O-RevB
Size:
Part Number:
Rev
Date:
Sheet
of
Chennai
India
Project
Name:
Page:
Name:
Board
LAN9252-DIG-IO-EVB
B
B
3
9
Tuesday, October 21, 2014
LAN9252-DIG-IO-EVB
Power Supply & RST
EVB3-9252-DIG-I/O-RevB
U2
TPS3125
SOT23_5
Threshold = 2.64V
Delay = 180ms
RESET#
1
GND
2
RESET
3
MR#
4
VDD
5
TP2
ORANGE
D2
RED
1
A
2
C
Q1
NDS355AN_NMOS
1
G
3
S
2
D
C5
0.1uF
R5
4.75K
1%
U1
3_Amp
GND
3
VIN
2
ENABLE
1
TRIM
5
VOUT
4
J1
1
2
3
D1
GRN
1
A
2
C
R1
0E
R2
1K
C6
0.1uF
TP3
BLACK
FB1
2A/0.05DCR
R4A
33E
1%
C2
10uF
25V
C1
4.7uF
DNP
R3
3.30K
1%
TP1
RED
R6
10.0K
1/10W
1%
1
2
C4
10uF
SW2
sw_pb_2P
R7
100
1/10W
1%
1
2
R8
1K
TP4
BLACK
C3
0.1uF
R9
2.2K
U3
74LVC1G14
2
4
5
3
1
SW1
P/N:1101M2S3CQE2
Switch, SPDT, Slide
2
3
1
R4
470E
1%
